A revelation goes against widely held ideas about how some glaciers work, and it suggests that at least parts of Greenland's ice sheet survived periods of global warming intact.
Since the disastrous BP spill in 2010, environmentalists have kept watch over Louisiana's coastline. One consortium says there's far more oil leaking into the Gulf than companies are reporting.
The pink on a flamingo? Stripes on a zebra? Spots on a giraffe? All explained. Simply. Elegantly. Oddly.
Citing recent progress and the Easter holiday, Ukrainian officials say they've suspended an "anti-terrorist operation" aimed at pro-Russian forces who have occupied government buildings.